2609139361 has 4 divisors (see below), whose sum is σ = 2611895472. Its totient is φ = 2606383252.

The previous prime is 2609139353. The next prime is 2609139371. The reversal of 2609139361 is 1639319062.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2609139361 - 2³ = 2609139353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2609139371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1376635 + ... + 1378528.

It is an arithmetic number, because the mean of its divisors is an integer number (652973868).

Almost surely, 2^2609139361 is an apocalyptic number.

It is an amenable number.

2609139361 is a deficient number, since it is larger than the sum of its proper divisors (2756111).

2609139361 is an equidigital number, since it uses as much as digits as its factorization.

2609139361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2756110.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 2609139361 is about 51079.7353262524. The cubic root of 2609139361 is about 1376.6781689017.

The spelling of 2609139361 in words is "two billion, six hundred nine million, one hundred thirty-nine thousand, three hundred sixty-one".